Upload one JFIF file up to 10 MB and get a standard .jpg back. Runs in your browser, so the file never leaves your device.
JFIF stands for JPEG File Interchange Format. It is not a different image format from JPG — it is the standard container that essentially every JPG already uses. A file ending in .jfif contains ordinary JPEG data. The only real difference is the extension, which is why the image looks identical before and after conversion.
JFIF files usually appear when saving an image from a browser, most often Chrome or Edge on Windows. A registry association causes the browser to write .jfif instead of .jpg. The image is fine; it is the extension that confuses other software, which is why the file may refuse to open or upload.
The file is decoded and written back out as a standard JPG with a .jpg extension, so applications that reject .jfif will accept it. Because JFIF is already JPEG data, there is no format translation happening — just a re-encode and a correct extension.
Everything happens on your device using your browser's canvas. Nothing is uploaded. One file at a time, up to 10 MB.
Re-encoding a JPEG applies compression a second time. At the default quality setting this is usually invisible, but if you need a byte-identical file, simply renaming the extension from .jfif to .jpg in your file manager achieves the same compatibility fix with no re-encoding at all.
Drag the .jfif file onto the uploader or choose it from your device. Files up to 10 MB are supported.
The file is re-encoded as a standard JPG immediately in your browser.
Download the converted file. It will have a .jpg extension and open normally in any application.
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JFIF (JPEG File Interchange Format) is the standard container format for JPEG image data. Almost every .jpg file on your computer is technically a JFIF file. When a file is saved with the .jfif extension instead of .jpg, the contents are identical — only the extension differs.
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